Data recovery and disk repair questions and discussions related to old-fashioned SATA, SAS, SCSI, IDE, MFM hard drives - any type of storage device that has moving parts
April 25th, 2024, 9:56
The TLL adapter basically emulates COM port on USB right? If so, can I just connect the seagate drive interface directly to a COM port on my PC? I'm planning to use a PC with Windows XP or 7.
April 25th, 2024, 10:32
that would suck
COM port uses +-12V signaling, which would kill the pcb instantly...
you need to match IO voltage to that of the pcb.
pepe
April 27th, 2024, 13:29
pepe wrote:that would suck
COM port uses +-12V signaling, which would kill the pcb instantly...
you need to match IO voltage to that of the pcb.
pepe
Do you know the IO voltage of the Seagate ST310014ACE drive by any chance? I'm new to unlocking by TLL adaptor.
April 27th, 2024, 15:13
kotel wrote:Do you know the IO voltage of the Seagate ST310014ACE drive by any chance? I'm new to unlocking by TLL adaptor.
Measure it. I'm guessing it will be 3.3V.
May 28th, 2024, 14:47
fzabkar wrote:kotel wrote:Do you know the IO voltage of the Seagate ST310014ACE drive by any chance? I'm new to unlocking by TLL adaptor.
Measure it. I'm guessing it will be 3.3V.
On the EEPROM or somewhere else on the PCB? I couldn't find any info of where to measure it.
May 28th, 2024, 15:15
Just measure the Tx/Rx pins. One or both will be sitting at the Vio supply rail.
May 29th, 2024, 15:23
fzabkar wrote:Just measure the Tx/Rx pins. One or both will be sitting at the Vio supply rail.
Pins 8,6,2 are sitting at 5v. Pin 4 is the only 3.3v and pin 3 (the pin above it) sits at 5v. Rest show 0 volts. Will the pin 4 be the i/o voltage?
May 29th, 2024, 15:32
I wasn't expecting to see 5V.
The ROM's Vcc pin would be the Vio voltage. I would use a 3.3V TTL adaptor.
Yesterday, 6:52
Just making sure I pick the right one. I found some TLL adapters. One is a MAX232 without pins for 3.3v and 5v that plugs directly to COM (description says it supports voltages from 3.3 to 5v) and an PL2303 based one with seperate pins for 3.3v and 5v (USB interface), which seller listed as UART USB TLL RS232 adaptor. Which one is the correct one?
Yesterday, 13:46
I would purchase a USB-TTL adaptor, but either should work. You can also find adaptors with multiple selectable I/O voltages (1.8V, 2.5V, 3.3V).
Powered by phpBB © phpBB Group.